Signed-off-by: S Pawan Kumar <pawan.kumar@incoresemi.com>

Fix isa generation logic to account for same test with different XLENs.

Fix to ignore irregularities in prefixes of isa. RV32 and RV64 isa can be applicable for the same test.

rename the "master" branch of riscv-arch-test to "main" 

Doc dependency fix

[skip ci] fix broken links in docs

add isa strings of bitmanip and crypto scalar specs

Fix failure reporting

Improve diff reporting.

Add support for new RVTEST_ISA macro.

Fix Return Code